NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

27 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 951
ONVOY, LLC - CA 25
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 1
BANDWIDTH.COM CLEC, LLC - CA 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-03-23 951-541-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2004-03-23 951-541-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2004-03-23 951-567-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2004-03-23 951-582-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2004-03-19 951-442-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2004-03-19 951-442-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2004-03-19 951-537-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2004-03-19 951-537-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2004-03-19 951-609-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ELSINORE CA
2004-03-18 951-375-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2004-03-18 951-375-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2004-03-16 951-565-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WOODCREST CA
2004-03-16 951-667-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 TEMSCL CNY CA
2004-03-07 951-707-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2004-03-07 951-956-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-03-07 951-956-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-03-04 951-755-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BANNING CA
2004-03-01 951-537-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HEMT HEMT CA
2004-02-17 951-707-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2004-02-17 951-769-4XXX 4000–4999Assigned FRONTIER CALIFORNIA INC. 2319 BANNING CA
2004-02-16 951-837-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2004-02-16 951-837-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2004-02-16 951-956-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-02-13 951-956-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-01-27 951-587-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2004-01-23 951-346-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-23 951-346-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-23 951-368-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-23 951-368-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-23 951-541-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2004-01-23 951-826-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2004-01-23 951-826-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-23 951-826-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-23 951-905-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2004-01-16 951-493-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CORONA CA
2004-01-16 951-834-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2004-01-16 951-834-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2004-01-15 951-246-4XXX 4000–4999Assigned FRONTIER CALIFORNIA INC. 2319 SUN CITY CA
2004-01-15 951-325-7XXX 7000–7999Assigned FRONTIER CALIFORNIA INC. 2319 HEMT HMLD CA
2004-01-13 951-707-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2004-01-13 951-956-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-01-13 951-956-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2004-01-09 951-294-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2004-01-09 951-375-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TEMECULA CA
2004-01-08 951-321-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2004-01-08 951-346-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2004-01-08 951-750-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-12-09 951-413-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J MORENO CA
2003-12-09 951-655-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2003-12-09 951-901-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODCREST CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.